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Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Tests  >  RRB JE Mock Test Series for Computer Science Engineering 2025  >  RRB JE IT (CBT II) Mock Test- 4 - Computer Science Engineering (CSE) MCQ

RRB JE IT (CBT II) Mock Test- 4 - Computer Science Engineering (CSE) MCQ


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30 Questions MCQ Test RRB JE Mock Test Series for Computer Science Engineering 2025 - RRB JE IT (CBT II) Mock Test- 4

RRB JE IT (CBT II) Mock Test- 4 for Computer Science Engineering (CSE) 2024 is part of RRB JE Mock Test Series for Computer Science Engineering 2025 preparation. The RRB JE IT (CBT II) Mock Test- 4 questions and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus.The RRB JE IT (CBT II) Mock Test- 4 MCQs are made for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB JE IT (CBT II) Mock Test- 4 below.
Solutions of RRB JE IT (CBT II) Mock Test- 4 questions in English are available as part of our RRB JE Mock Test Series for Computer Science Engineering 2025 for Computer Science Engineering (CSE) & RRB JE IT (CBT II) Mock Test- 4 solutions in Hindi for RRB JE Mock Test Series for Computer Science Engineering 2025 course. Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free. Attempt RRB JE IT (CBT II) Mock Test- 4 | 150 questions in 120 minutes | Mock test for Computer Science Engineering (CSE) preparation | Free important questions MCQ to study RRB JE Mock Test Series for Computer Science Engineering 2025 for Computer Science Engineering (CSE) Exam | Download free PDF with solutions
RRB JE IT (CBT II) Mock Test- 4 - Question 1
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When the gases Sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction is

SO2 + 2H2S → 2H2O + 3S

Here hydrogen sulphide is acting as

Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 1

Concept:

The oxidizing and reducing agent are selected always from the reactant side and never from the product side.

Oxidation:

The addition of oxygen or removal of hydrogen is called as oxidation

The substance getting oxidized acts as reducing agent

Reduction:

The removal of oxygen or addition of hydrogen is reduction

The substance getting reduced acts as oxidizing agent

Application:

H2S is getting converted into H2O which is the addition of oxygen i.e. it is getting oxidized. Hence H2S is a reducing agent.

RRB JE IT (CBT II) Mock Test- 4 - Question 2
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Which of the following elements replaced eka-Aluminium in Mendeleev’s Periodic Table?

Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 2
Gallium replaced eka-Aluminium in Mendeleev’s Periodic Table.

While developing his Periodic Table of the elements, Mendeleev found some elements missing, which later would be found and named Gallium, he named aka-Aluminum.

Mendeleev gave the name eka-Aluminium to a compound which contains aluminium, a mixture of aluminium and an unknown element.

Unknown elements he predicted would have properties similar to those of aluminium and which have rare isotopes of aluminium.

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RRB JE IT (CBT II) Mock Test- 4 - Question 3
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The hydronium ions of acid rain mobilize toxins such as

Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 3
Acid rain refers to the rainfall (precipitation) with a pH of less than 5. It is a mixture of H2SO4 and HNO3. The ratio of the two acids vary depending on the relative quantities of sulfur oxides and nitrogen oxides present in the atmosphere.

These oxides are mainly produced by the combustion of fossil fuels, smelters, industries, power plants, automobile exhausts etc.

The hydronium ions of acid rain also mobilize toxins, such as aluminium, and leach away essential nutrients and minerals such as calcium and magnesium.

RRB JE IT (CBT II) Mock Test- 4 - Question 4
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Which of the following is correct about RDBMS?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 4
A superkey is a set of one or more attributes that, collectively, allow us to identify uniquely a tuple in the relation.

The minimal set of attributes which can uniquely identify a tuple is known as a candidate key.

The primary key is a candidate key that is chosen by the database designer as the principal means of identifying tuples within a relation.

RRB JE IT (CBT II) Mock Test- 4 - Question 5
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Which of the following query will provide error-free output?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 5
Aggregate functions are functions that take a collection (a set or multiset) of values as input and return a single value. SQL offers five built-in aggregate functions

Avg, max, min, sum, count

For any aggregate function with non-aggregate columns there must be group by clause on non-aggregate columns.

RRB JE IT (CBT II) Mock Test- 4 - Question 6
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Which component of the information system is a series of steps undertaken to achieve a desired outcome or goal?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 6
An information system is made up of five components: hardware, software, data, people, and process.

Information systems hardware is the part of an information system one can touch i.e. the physical components of the technology.

Software is a set of instructions that tells the hardware what to do. Software is not tangible i.e. it cannot be touched.

A data is a collection of facts.

The people component of an information system encompasses all those individuals who are directly involved with the system.

A process is the set of steps employed to carry out a specific business or organizational activity. In other words, a process maps the set of actions that an individual, a group or an organization must enact in order to complete an activity.

RRB JE IT (CBT II) Mock Test- 4 - Question 7
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The people component of an information system encompasses _______
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 7
The people component of an information system encompasses all those individuals who are directly involved with the system.

People are involved in information systems:

People imagine information systems, people develop information systems, people support information systems, and, perhaps most importantly, people use information systems.

RRB JE IT (CBT II) Mock Test- 4 - Question 8
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Which type of information system users adopt innovation after a technology has been introduced and proven?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 8
An information system user can be divided into five categories

Innovators: Innovators are the first individuals to adopt a new technology

Early adopters: The early adopters are those who adopt innovation after a technology has been introduced and proven

Early majority: Individuals in this category adopt an innovation after a varying degree of time

Late majority. The late majority will adopt an innovation after the average member of the society

Laggards. Individuals in this category are the last to adopt an innovation

RRB JE IT (CBT II) Mock Test- 4 - Question 9
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Which of the following instructions perform operations on data?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 9
Data manipulation instructions perform operations on data and provide the computational capabilities for the computer. The data manipulation instructions in a typical computer are usually divided into three basic types

1. Arithmetic instructions

2. Logical and bit manipulation instructions

3. Shift instructions

RRB JE IT (CBT II) Mock Test- 4 - Question 10
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1011 is BCD representation of:
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 10
BCD stands for binary coded decimal since only decimal numbers are represented; digits 0-9 are encoded in BCD format.

1010 to 1111 are not used for BCD representation of any digit since they do not represent any digit from 0 to 9 of the decimal number system.

RRB JE IT (CBT II) Mock Test- 4 - Question 11
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Iron nail when placed in copper sulphate solution ,Iron nail turns reddish brown due to:
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 11
The initial blue colour of copper sulphate solution is changed to light green colour of iron sulphate.

The initial silver colour of iron nail is changed to reddish-brown colour due to coating of copper metal on the nail.

RRB JE IT (CBT II) Mock Test- 4 - Question 12
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Which of the following is an example of hardware?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 12
Information systems hardware is the part of an information system one can touch i.e. the physical components of the technology.

Computers, keyboards, disk drives, iPads, and flash drives are all examples of information systems hardware.

The motherboard is the main circuit board on the computer. The CPU, memory, and storage components, among other things, all connect into the motherboard. Motherboards come in different shapes and sizes, depending upon how compact or expandable the computer is designed to be.

RRB JE IT (CBT II) Mock Test- 4 - Question 13
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________ interrupts arise from illegal or erroneous use of an instruction or data.
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 13
Types of Interrupts: There are three major types of interrupts that cause a break in the normal execution of a program. They can be classified as:

  • External interrupts

  • Internal interrupts

  • Software interrupts

External interrupts come from input-output (I/O) devices, from a timing device, from a circuit monitoring the power supply, or from any other external source.

Examples of external interrupts are I/O device requesting transfer of data, I/O device finished transfer of data, elapsed time of an event, or power failure.

Internal interrupts arise from illegal or erroneous use of an instruction or data. Internal interrupts are also called traps.

Examples of interrupts caused by internal error conditions are register overflow, attempt to divide by zero, an invalid operation code, stack overflow, and protection violation.

RRB JE IT (CBT II) Mock Test- 4 - Question 14
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Excess-3 code for decimal number 7 is:
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 14

For getting excess 3 code, add +3 to the number

7 + 3 = 10

10 In binary is (1010)2

Hence excess 3 code for 7 is (1010)2

RRB JE IT (CBT II) Mock Test- 4 - Question 15
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The general system of symbol-for-symbol substitution is called a _____.
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 15
The general system of symbol-for-symbol substitution is called a monoalphabetic substitution, with the key being the 26-letter string corresponding to the full alphabet.

plaintext: a b c d e f g h i j k l m n o p q r s t u v w x y z

ciphertext: Q W E R T Y U I O P A S D F G H J K L Z X C V B N M

For the key above, the plaintext attack would be transformed into the ciphertext QZZQEA.

RRB JE IT (CBT II) Mock Test- 4 - Question 16
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Which of the following is true?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 16

Cipher: character for character transformation and bit-for-bit transformation.

Encrypted messages sent using a machine are called ciphertext.

Code: replaces one word with another or one symbol with another.

People use the sound of a bird as a code so that their enemy doesn’t understand the message even if they hear it.

RRB JE IT (CBT II) Mock Test- 4 - Question 17
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Cryptographic algorithms are implemented in software mainly because of
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 17

Cryptographic algorithms can be implemented in either hardware or software

Implementation of cryptographic algorithms in hardware increases the speed

Implementation of cryptographic algorithms in software increases the flexibility

RRB JE IT (CBT II) Mock Test- 4 - Question 18
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Which among the following helps in monitoring air pollution?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 18

Lichen helps in monitoring air pollution.

Lichens are small plants that are integrated with a fungus and algae.

The algae and fungus absorb water, minerals, and pollutants from the air, through rain and dust.

If the air is clean, lichens become superabundant.

If the air is polluted, it can damage lichens and prevent them from growing.

RRB JE IT (CBT II) Mock Test- 4 - Question 19
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To prevent misuse of industrial ethanol, which of the following is added to it:
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 19
To prevent the misuse of ethanol produced for industrial use, it is made unfit for drinking by adding poisonous substances like methanol to it.

Dyes are also added to colour the alcohol blue so that it can be identified easily. This is called denatured alcohol.

RRB JE IT (CBT II) Mock Test- 4 - Question 20
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A dipole is said to be in unstable equilibrium when angle between electric field and dipole moment is
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 20
A dipole is said to be in unstable equilibrium when a maximum torque acts on it. This happens when the angle between the electric field and the dipole moment is 180°. At this angle they are anti parallel to each other.
RRB JE IT (CBT II) Mock Test- 4 - Question 21
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The minimum number of rows and columns in a table that can be created in a document by using ms word is
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 21
A table on Microsoft Word must have a minimum of one row and one column when it is created.
RRB JE IT (CBT II) Mock Test- 4 - Question 22
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Which feature is used to eliminate unwanted part of an image in MS word?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 22
In MS word after selecting the required image, the format tab will appear in the upper toolbar menu.

Find the "Crop" command in the "Format" tab, located in the far right. A cropping handle will be used to delete unwanted parts of the image.

Remove background is used to remove the background of a picture or image.

RRB JE IT (CBT II) Mock Test- 4 - Question 23
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What is the file extension of Excel Macro-enabled Template?
RRB JE IT (CBT II) Mock Test- 4 - Question 24
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What is a URL?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 24
URL is an acronym for Uniform Resource Locator and is a reference (an address) to a resource on the Internet. A URL has two main components: Protocol identifier: For the URL http://example.com , the protocol identifier is http . Resource name: For the URL http://example.com, the resource name is example.com.
RRB JE IT (CBT II) Mock Test- 4 - Question 25
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Which margin helps users to format margins for back-to-back printing?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 25
Word includes a unique setting that allows the user to "mirror" the margins of a page depending on whether the page is an odd or even page.

Mirror margins are typically used to designate a page layout that will eventually be two-sided.

RRB JE IT (CBT II) Mock Test- 4 - Question 26
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Which among the following is the first state to establish Panchayati Raj?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 26
Rajasthan was the first state to establish Panchayati Raj. It was inaugurated on October 2, 1959.

Rajasthan was followed by Andhra Pradesh, which also adopted the system in 1959.

RRB JE IT (CBT II) Mock Test- 4 - Question 27
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Which of the following is a communications protocol standard for securing credit card transactions over networks?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 27
A secure electronic transaction (SET) is a set of security protocols and formats that enables users to employ the existing credit card payment infrastructure on an open network in a secure fashion.

To use SET protocol, it is assumed that

Each party involved in e-commerce transactions has a public and private key. A public key encryption is used.

All parties have their public keys certified.

A standard hashing algorithm is used to create message digest for signature verification.

RRB JE IT (CBT II) Mock Test- 4 - Question 28
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Two copper conductors have equal length and. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 Ω the resistance of the parallel combination will be is:
RRB JE IT (CBT II) Mock Test- 4 - Question 29
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What is the extension of the java file?
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 29
.java file is a source code file written in the Java programming language, which was originally developed by Sun Microsystems but is now maintained by Oracle. It uses an object-oriented approach, where structured data types, called classes, are used to instantiate objects at runtime.
RRB JE IT (CBT II) Mock Test- 4 - Question 30
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First element of an array is stored at index _____.
Detailed Solution for RRB JE IT (CBT II) Mock Test- 4 - Question 30
An array is a collection of variables that are accessed with an index number.

Arrays are indexed starting at 0, as opposed to starting at 1.

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