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Test: Data Path and Control Unit - Computer Science Engineering (CSE) MCQ


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10 Questions MCQ Test GATE Computer Science Engineering(CSE) 2025 Mock Test Series - Test: Data Path and Control Unit

Test: Data Path and Control Unit for Computer Science Engineering (CSE) 2024 is part of GATE Computer Science Engineering(CSE) 2025 Mock Test Series preparation. The Test: Data Path and Control Unit questions and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus.The Test: Data Path and Control Unit MCQs are made for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Data Path and Control Unit below.
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Test: Data Path and Control Unit - Question 1

Which of the following control signals has separate destinations?

Detailed Solution for Test: Data Path and Control Unit - Question 1

The data path is the collection of functional units such as arithmetic logic units or multipliers. The data path is required to perform data processing operations.
Typically, in a microprocessor, the units in at least one of the datapaths would be: instruction registers, decode latch, ALU registers, load-store unit, writeback unit, and the memory.
To perform any operation in the CPU, data follows a specific path within the CPU to execute the instruction. 

Test: Data Path and Control Unit - Question 2

How many address lines and data lines are required to provide a memory capacity of 16K x 16?

Detailed Solution for Test: Data Path and Control Unit - Question 2

Memory capacity =16K × 16 = 214 × 24
Memory Capacity is of the form = 2m × 2n
Address lines required = m = 14
Data Lines required = 2n = 16
Option 4 is correct

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Test: Data Path and Control Unit - Question 3

What is/are the advantages of using microprogramming as compared to hardwired method in implementation of control unit?

Detailed Solution for Test: Data Path and Control Unit - Question 3

Hardwired v/s micro-programmed control unit:- To execute an instruction, the control unit of the CPU must generate the required control signal in the proper sequence. There are two approaches used for generating the control signals in proper sequence as Hardwired Control unit and the Micro-programmed control unit.

Test: Data Path and Control Unit - Question 4

Which of the following is considered to be the brain of a computer system?

Detailed Solution for Test: Data Path and Control Unit - Question 4

Central Processing Unit (CPU) consists of the following features:

  • CPU is considered the brain of the computer.
  • CPU performs all types of data processing operations.
  • It stores data, intermediate results, and instructions (program).
  • It controls the operation of all parts of the computer.
Test: Data Path and Control Unit - Question 5

EBCDIC coding scheme uses ______ bits to code different characters.

Detailed Solution for Test: Data Path and Control Unit - Question 5

Extended Binary Coded Decimal Interchange Code is an eight-bit character encoding used mainly on IBM mainframe and IBM midrange computer operating systems.
EBCDIC was devised in 1963 and 1964 by IBM. It is an eight-bit character encoding, developed separately from the seven-bit ASCII encoding scheme.

Test: Data Path and Control Unit - Question 6

A chip having 150 gates will be classified as ________.

Detailed Solution for Test: Data Path and Control Unit - Question 6

Concept:
Memory chips are integrated circuits that can hold information. Memory chips are now available in a variety of RAM formats, including DRAM, EPROM, EEPROM, and SRAM. Memory chips can also be included in hardware devices such as video cards.

A chip having 150 gates will be classified as LSI (large-scale integration).
Large-scale integration (LSI) is the process of integrating or embedding thousands of transistors on a single silicon semiconductor microchip.

Hence the correct answer is LSI.

Test: Data Path and Control Unit - Question 7

Which component of the computer is used to resolve the difference between CPU and the peripheral device?

Detailed Solution for Test: Data Path and Control Unit - Question 7

The purpose of the Interface unit is to resolve the differences that exist between the central computer and each peripheral. 
The Major Differences are:-

  • Peripherals are electromechanical and electromagnetic devices and CPU and memory are electronic devices. Therefore, a conversion of signal values may be needed.
  • The data transfer rate of peripherals is usually slower than the transfer rate of the CPU and consequently, a synchronization mechanism may be needed.
  • Data codes and formats in the peripherals differ from the word format in the CPU and memory.
  • The operating modes of peripherals are different from each other and must be controlled so as not to disturb the operation of other peripherals connected to the CPU.

To Resolve these differences, computer systems include special hardware components between the CPU and Peripherals to supervises and synchronizes all input and out transfers.

Test: Data Path and Control Unit - Question 8

Dynamic RAM (DRAM) is slower than Static RAM (SRAM) because  _________

Detailed Solution for Test: Data Path and Control Unit - Question 8

SRAM (static RAM) is random access memory (RAM) that retains data bits in its memory as long as power is being supplied.
Inside a dynamic RAM chip, each memory cell holds one bit of information and is made up of two parts: a transistor and a capacitor.
As DRAM has a capacitor, it continuously leaks current. Therefore it requires frequent refresh which consumes power. Hence, DRAM is slower than SRAM.

Test: Data Path and Control Unit - Question 9

A register in the microprocessor that keeps track of the answer or result of any arithmetic or logic operation is the _________. 

Detailed Solution for Test: Data Path and Control Unit - Question 9

Accumulator:
It is a register used for storing intermediate results of larger computation. It keeps track of result of any arithmetic or logic operation.

Stack pointer:
It is a register that stores the address of the last program request in a stack. It gives the address of the top of the stack. When a value is pushed into stack the processor gets the value in stack pointer, then processor decrements the address to point to the next available slot in memory and store its address in stack pointer.

Program counter:
It is a register in a computer processor that contains the address of the instruction to be executed next. It is a digital counter needed for faster execution of tasks. It is also known as instruction counter, instruction pointer, instruction address register. 

Test: Data Path and Control Unit - Question 10

The following program is stored in memory unit of the basic computer. What is the content of the accumulator after the execution of program? (All location numbers listed below are in hexadecimal).

Detailed Solution for Test: Data Path and Control Unit - Question 10


(9CE2)16 = (1001 1100 1110 0010)2
1's complement of (9CE2)16 = (0110 0011 0001 1101)2 = (631D)16
(631D)16 & (1235)16 = (0215)16
Hence the correct answer is 0215H.

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