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Knowledge Hub
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Knowledge Hub
EduRev SSC CGL
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Content, tests & courses saved by you for accessing later. (visible to you only)
Courses Created by Knowledge Hub
Content created by Knowledge Hub
 | Flashcards: First in World (Other Categories) Flashcard | 5 cards |  |
| Flashcards: First in World (Female) Flashcard | 10 cards | |
| Flashcards: First in World (Male) Flashcard | 10 cards | |
| Flashcards: Motion and Laws of Motion Flashcard | 9 cards | |
| Flashcards: Unit Flashcard | 11 cards | |
| Flashcards: Substance and its Nature Flashcard | 8 cards | |
| Flashcards: Cytology Flashcard | 11 cards | |
| Flashcards: Classification of an Organism Flashcard | 9 cards | |
| Flashcards: Geomorphology Flashcard | 10 cards | |
| Flashcards: Physical Geography of India Flashcard | 11 cards | |
| Flashcards: Expansion of British Power Flashcard | 7 cards | |
| Flashcards: The Delhi Sultanate Flashcard | 12 cards | |
 | Mnemonics : Introduction to Physiographic Divisions Doc | 3 pages | |
 | Mnemonics : Geomorphology Doc | 1 page | |
 | Mnemonics: Motion and Laws of Motion Doc | 1 page | |
 | Mnemonics: Substance and its Nature Doc | 1 page | |
 | Mnemonics: The Cell Doc | 1 page | |
 | Mnemonics: Expansion of British Power Doc | 1 page | |
 | Mnemonics: The Advent of Europeans in India Doc | 1 page | |
 | Mnemonics: Chronology- The Delhi Sultanate Doc | 1 page | |
 | Mnemonics : Union and its Territory Doc | 1 page | |
 | Mnemonics : Preamble Doc | 1 page | |
 | Mnemonics: The Sangam Age Doc | 1 page | |
 | Mnemonics: Constitution of India Doc | 5 pages | |
 | Mnemonics: The Gupta Period Doc | 1 page | |
 | Mnemonics: The Mauryan Empire Doc | 1 page | |
 | Mnemonics: Buddhism and Jainism Doc | 1 page | |
 | Mnemonics: Mahajanapada Period Doc | 1 page | |
 | Mnemonics: The Vedic Period Doc | 1 page | |
 | Mnemonics: Indus Valley Civilization Doc | 1 page | |
 | Tips and Tricks: Percentages Doc | 5 pages | |
 | सारांश: बहुभुज Doc | 8 pages | |
 | चतुर्भुज: अवलोकन और उदाहरण Doc | 17 pages | |
 | संक्षेप: वृत्त Doc | 22 pages | |
 | समाधान किए गए उदाहरण: त्रिकोण Doc | 4 pages | |
 | त्रिकोणों की संगति और समानता Doc | 6 pages | |
 | महत्वपूर्ण सूत्र: डेटा पर्याप्तता Doc | 4 pages | |
 | टिप्स और ट्रिक्स: डेटा पर्याप्तता Doc | 4 pages | |
 | आँकड़े (Statistics) Doc | 7 pages | |
 | हल किए गए प्रश्न: समन्वित ज्यामिति Doc | 3 pages | |
 | टिप्स और ट्रिक्स: समन्वय ज्यामिति Doc | 2 pages | |
 | महत्वपूर्ण सूत्र: समन्वय ज्यामिति Doc | 2 pages | |
 | महत्वपूर्ण सूत्र: परिमाण और संयोजन Doc | 3 pages | |
 | टिप्स और ट्रिक्स: घड़ी और कैलेंडर Doc | 4 pages | |
 | महत्वपूर्ण सूत्र: घड़ी और कैलेंडर Doc | 6 pages | |
 | टिप्स और ट्रिक्स: प्रतियोगिताएँ और खेल Doc | 5 pages | |
 | महत्वपूर्ण सुझाव: नावें और धाराएँ Doc | 2 pages | |
 | महत्वपूर्ण सूत्र: नावें और धाराएँ Doc | 5 pages | |
 | महत्वपूर्ण तथ्य और सूत्र: ट्रेनों पर आधारित समस्याएँ Doc | 8 pages | |
 | महत्वपूर्ण सुझाव: पाइप और जलाशय Doc | 3 pages | |
Discussed Questions
In which field are computers used to control manufacturing systems and monitor parameters like temperature and pressure?- a)Education
- b)Science
- c)Industry
- d)Health
Correct answer is option 'C'. Can you explain this answer?
In which field are computers used to control manufacturing systems and monitor parameters like temperature and pressure?
a)
Education
b)
Science
c)
Industry
d)
Health
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Knowledge Hub answered • 22 minutes ago |
In the industrial sector, computers play a vital role in:
- Controlling manufacturing systems
- Monitoring key parameters such as temperature, pressure, and volume
- Enabling automation for increased efficiency
- Ensuring consistent quality of products
These functions are crucial for optimising operations and maintaining standards in the industry.
RS 232 communication is- a)Full duplex
- b)Half duplex
- c)Simplex
- d)Command response system
- e) Not Attempted
Correct answer is option 'A'. Can you explain this answer?
RS 232 communication is
a)
Full duplex
b)
Half duplex
c)
Simplex
d)
Command response system
e)
Not Attempted
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Knowledge Hub answered • 22 minutes ago |
Concept:
The data flow between the two devices can be in simplex, half-duplex, and full-duplex modes.
Simplex: In Simplex, communication is unidirectional. Only one of the devices sends the data and the other one only receives the data.
Example: A CPU sends data while a monitor only receives data.
Half-Duplex: In half-duplex both the stations can transmit as well as receive but not at the same time. When one device is sending others can only receive and vice-versa
Example: A walkie-talkie.
Full Duplex: In Full-duplex mode, both stations can transmit and receive at the same time.
Example: Mobile phones
Application:
- RS-232 is a bi-directional (Full duplex) point to point communication link.
- Two independent channels are established for two-way (Full-Duplex) communication.
- This can be better understood with the following diagram:
What are the units used to count the speed of a printer?- a)DPI
- b)CPM
- c)PPM
- d)BIT
- e)None of these
Correct answer is option 'C'. Can you explain this answer?
What are the units used to count the speed of a printer?
a)
DPI
b)
CPM
c)
PPM
d)
BIT
e)
None of these
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Knowledge Hub answered • 23 minutes ago |
The correct unit used to count the speed of a printer is C. PPM (pages per minute). PPM measures the number of pages a printer can produce in one minute.
DPI (dots per inch) is a unit used to measure the resolution or print quality of an image or document. It represents the number of dots or pixels that can be printed per inch.
CPM (characters per minute) is a unit used to measure the speed of typewriters or old dot matrix printers in terms of characters typed or printed in one minute.
BIT is a unit of data storage and not specifically used to measure printer speed.
Therefore, the correct answer is C. PPM.
A PCMCIA measuring 10.5mm is what type?- a)type 1
- b)type 2
- c)type 1 and 3
- d)type 3
- e)type 4
Correct answer is option 'D'. Can you explain this answer?
A PCMCIA measuring 10.5mm is what type?
a)
type 1
b)
type 2
c)
type 1 and 3
d)
type 3
e)
type 4
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Knowledge Hub answered • 23 minutes ago |
PCMCIA (Personal Computer Memory Card International Association) cards come in three different types, based on their thickness and dimensions:
- Type 1: These cards have a thickness of 3.3mm.
- Type 2: These cards have a thickness of 5.0mm.
- Type 3: These cards have a thickness of 10.5mm.
Since the measurement provided is 10.5mm, it corresponds to a type 3 PCMCIA card. Therefore, the correct answer is D. type 3.
Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because:- a)there are a lot more I/O addresses than IRQs.
- b)the BIOS sometimes has more of a problem controlling IRQs
- c)I/O addresses cannot conflict
- d)software tends to correct I/O conflicts
- e)All of the above
Correct answer is option 'A'. Can you explain this answer?
Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because:
a)
there are a lot more I/O addresses than IRQs.
b)
the BIOS sometimes has more of a problem controlling IRQs
c)
I/O addresses cannot conflict
d)
software tends to correct I/O conflicts
e)
All of the above
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Knowledge Hub answered • 23 minutes ago |
In a computer system, IRQs (Interrupt Requests) are used to manage hardware interrupts, which allow devices to communicate with the CPU. On the other hand, I/O (Input/Output) addresses are used to access hardware devices and their corresponding registers.
The number of available IRQs is typically limited, usually ranging from 16 to 24, depending on the system. In contrast, there is a much larger range of I/O addresses available.
Due to the limited number of IRQs, conflicts can occur when multiple devices attempt to use the same IRQ simultaneously. This can lead to hardware resource conflicts, causing malfunctions or failures.
While I/O conflicts can also occur if multiple devices try to use the same I/O address, the likelihood of such conflicts is lower because there are typically many more available I/O addresses compared to the number of IRQs.
Therefore, it is more likely for a hardware resource conflict to be an IRQ conflict rather than an I/O conflict.
What is the purpose of a firewall in a computer network?- a)To prevent unauthorized access to a computer
- b)To scan and remove viruses from files
- c)To manage network connections
- d)To provide wireless internet access
- e)To store and retrieve data
Correct answer is option 'A'. Can you explain this answer?
What is the purpose of a firewall in a computer network?
a)
To prevent unauthorized access to a computer
b)
To scan and remove viruses from files
c)
To manage network connections
d)
To provide wireless internet access
e)
To store and retrieve data
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Knowledge Hub answered • 24 minutes ago |
A firewall is a network security device that acts as a barrier between an internal network and external networks, such as the internet. It monitors and controls incoming and outgoing network traffic, preventing unauthorized access to a computer or network.
What is the function of a web browser in a computer system?- a)To create and edit text documents
- b)To play multimedia files
- c)To manage email accounts
- d)To browse websites and access web content
- e)To create and edit images
Correct answer is option 'D'. Can you explain this answer?
What is the function of a web browser in a computer system?
a)
To create and edit text documents
b)
To play multimedia files
c)
To manage email accounts
d)
To browse websites and access web content
e)
To create and edit images
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Knowledge Hub answered • 24 minutes ago |
A web browser is a software application used to access, view, and interact with websites and web content. Popular web browsers include Google Chrome, Mozilla Firefox, and Microsoft Edge.
Which shortcut key combination is used to switch between open applications or windows in most Windows operating systems?- a)Alt + Tab
- b)Ctrl + C
- c)Ctrl + V
- d)Ctrl + Z
- e)Ctrl + A
Correct answer is option 'A'. Can you explain this answer?
Which shortcut key combination is used to switch between open applications or windows in most Windows operating systems?
a)
Alt + Tab
b)
Ctrl + C
c)
Ctrl + V
d)
Ctrl + Z
e)
Ctrl + A
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Knowledge Hub answered • 24 minutes ago |
The shortcut key combination Alt + Tab is used to switch between open applications or windows in most Windows operating systems. It displays a thumbnail view of all the currently running programs, and you can cycle through them by pressing Tab while holding down the Alt key.
Which of the following shortcut keys is used to end a PowerPoint presentation?- a)COMMA
- b)HYPEN
- c)ESC
- d)TAB
- e)All of the above
Correct answer is option 'C'. Can you explain this answer?
Which of the following shortcut keys is used to end a PowerPoint presentation?
a)
COMMA
b)
HYPEN
c)
ESC
d)
TAB
e)
All of the above
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Knowledge Hub answered • 24 minutes ago |
Basic PowerPoint shortcut keys:
- Ctrl + N – Create a new presentation document.
- Ctrl + O – Open an existing presentation document.
- Ctrl + S: Save a presentation.
- Alt + F2 or F12 – Open the Save As dialog box
- Ctrl + W or Ctrl + F4 – Close a presentation.
- Ctrl + Q – Save and close a presentation.
- Ctrl + Z – Undo an action.
- Ctrl + Y – Redo an action.
- Ctrl + F2 – Print Preview View.
Which of the following can be considered as the maximum size that is supported by NTFS?- a)4GB
- b)16TB
- c)64TB
- d)8TB
- e)54TB
Correct answer is option 'A'. Can you explain this answer?
Which of the following can be considered as the maximum size that is supported by NTFS?
a)
4GB
b)
16TB
c)
64TB
d)
8TB
e)
54TB
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Knowledge Hub answered • 25 minutes ago |
The New Technology File System was introduced in 1993 for the very first time as a part of new Windows operating systems (Windows NT 3.1).
You may be surprised to know that windows are still using it because of its fast speed and can support files whose size is up to 16TB (16 terabytes), which is much more than that file size supported by the old system.
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Knowledge Hub asked • Sep 21, 2021 |
Modified polyol ester is a suitable lubricant in a refrigeration system with the refrigerant:- a)R11
- b)R134a
- c)R245fa
- d)R12
Correct answer is option 'B'. Can you explain this answer?
Modified polyol ester is a suitable lubricant in a refrigeration system with the refrigerant:
a)
R11
b)
R134a
c)
R245fa
d)
R12
|
Om Desai answered |
Lubricants are essential for the performance and longevity of a refrigeration system. The choice of lubricant depends on the system, the refrigerant, and the type of application.
There are several categories of oils:
Mineral oils: They are particularly suited for use with CFC (R11, R12), HCFC (R22, R142b, R123) refrigerants, and ammonia.
Alkyl Benzene Oils (AB): AB oils are especially recommended for refrigerants like R-22 and HCFC blends.
Poly Alpha Olefins (PAO): It can be described as ‘mineral synthetic oils.’ PAO oils can be used in refrigeration systems working in extreme conditions with R-22 or ammonia. It has a low pour point and excellent thermal stability.
Poly Alkylene Glycols (PAG): These were the first oils developed for use with HFC refrigerants and are perfectly miscible with these products.
Polyol Ester Oils (POE): POE constitutes the second generation of lubricants developed for use with HFC’s (R134a, R152a). POE oils are excellent lubricants, less hygroscopic than PAG (Poly Alkylene Glycols), and chemically more stable than PAG when in the presence of water. POE oils are intended for all refrigeration and air conditioning applications.
HFCs cannot be used with mineral oils. Generally, POE is used. R134a is not miscible with mineral oil; therefore, a synthetic lubricant of polyester is used.
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Knowledge Hub asked • Jul 02, 2021 |
In ordinary Portland cement, the first one to react with water is :- a)C3A
- b)C2S
- c)C3S
- d)C4AF
Correct answer is option 'A'. Can you explain this answer?
In ordinary Portland cement, the first one to react with water is :
a)
C3A
b)
C2S
c)
C3S
d)
C4AF
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Rhea Reddy answered |
It is responsible for the initial set, high heat of hydration, and a greater tendency to volume change
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Knowledge Hub asked • Jul 02, 2021 |
If 4 × 6 × 9 × 1 = 4196,2 × 3 × 7 × 2 =2273 then 1 × 4 × 8 × 9 = ?- a)1984
- b)9841
- c)1489
- d)8149
Correct answer is option 'A'. Can you explain this answer?
If 4 × 6 × 9 × 1 = 4196,2 × 3 × 7 × 2 =2273 then 1 × 4 × 8 × 9 = ?
a)
1984
b)
9841
c)
1489
d)
8149
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Aisha Gupta answered |
The number and the final number of each other is changing in each number.
4 X 6 X 9 X 1 = 4196,2 X 3 X 7 X 2
=2273 1 X 4 X 8 X 9
= 1984
Hence, the correct option is (A).
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Knowledge Hub asked • Jul 02, 2021 |
If (+ = × , - = ÷ , × = + , ÷ = -) Then which is the correct equation of the following?- a)18 + 6 − 4 × 2 ÷ 3 = 26
- b)18 ÷ 6 + 4 − 2 ÷ 3 = 22
- c)18 × 6 − 4 + 7 × 8 = 47
- d)18 - 6 x 7 ÷ 2 + 8 = 63
Correct answer is option 'A'. Can you explain this answer?
If (+ = × , - = ÷ , × = + , ÷ = -) Then which is the correct equation of the following?
a)
18 + 6 − 4 × 2 ÷ 3 = 26
b)
18 ÷ 6 + 4 − 2 ÷ 3 = 22
c)
18 × 6 − 4 + 7 × 8 = 47
d)
18 - 6 x 7 ÷ 2 + 8 = 63
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Aisha Gupta answered |
18×6÷4+2−3
9×3+2−3
=26
Hence the correct answer is option (a).
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