NIMCET 2027 Computer Previous Year Questions (PYQs) – Page 2 of 23
Study Stuff for MCA Examinations
Solution
✅ Concept:
Cache memory is highly effective due to its ability to take advantage of the locality of reference. This refers to the tendency of programs to access a relatively small portion of memory repeatedly during execution.
✅ Explanation of Options:
- Memory Localization: Not the correct answer, as it's a general concept related to memory organization.
- Locality of Reference: The correct answer! This refers to the tendency of a program to repeatedly access the same memory locations, which cache memory leverages to speed up data access.
- Memory Size: Cache memory is small, and its size is actually one of the factors that makes it faster, but size alone does not determine its effectiveness.
- None of the Mentioned: This option is incorrect because "locality of reference" is the main reason cache memory is effective.
✅ Final Answer:
The most effective reason for cache memory is the $\boxed{\text{Locality of Reference}}$.
Which of the following statements about the fetch-decode-execute cycle in a CPU are correct?
I. The Program Counter is incremented after each instruction is fetched so the CPU moves to the next instruction.
II. The Control Unit is responsible for fetching instructions and placing them in the Instruction Register.
III. The ALU is responsible for decoding instructions and determining which operation to perform.
IV. Registers are used to permanently store the operating system's files for fast access.
Identify the correct option.
Solution
Statement I is correct.
The Program Counter stores the address of the next instruction. After fetching an instruction, it is usually incremented so that the CPU can move to the next instruction.
Statement II is also correct.
The Control Unit controls the fetch-decode-execute cycle. It fetches instructions from memory and places them into the Instruction Register.
Statement III is incorrect.
The ALU performs arithmetic and logical operations. It does not decode instructions. Instruction decoding is handled by the Control Unit.
Statement IV is incorrect.
Registers are small, fast storage locations inside the CPU. They do not permanently store operating system files.
So, only statements I and II are correct.
Solution
Solution
✅ Concept:
The fastest means of memory access for the CPU refers to the storage that allows the quickest retrieval of data. This is crucial for efficient processing and performance.
✅ Explanation of Options:
- Registers: Registers are the fastest form of memory access because they are directly in the CPU. However, they are very small and not used for regular memory storage.
- Cache: Cache memory is the most effective and frequently used type of memory, as it stores frequently accessed data for fast retrieval. It is still slower than registers but much faster than main memory.
- Main Memory: Main memory (RAM) is slower than both cache and registers, but it provides larger storage for currently active processes.
- Stack: The stack is used for storing function calls and local variables. While it is quick, it still doesn't surpass cache memory in terms of speed.
✅ Final Answer:
The fastest means of memory access for the CPU is $\boxed{\text{Registers}}$.
Solution
| Column A: Term | Column B: Meaning |
| $1.$ Web Browser | a. Converts a human-readable website name into a numerical network address |
| $2.$ URL | b. Program used to request, retrieve, and display web pages |
| $3.$ DNS | c. Standard rules used by browsers and servers to exchange web content |
| $4.$ HTTP | d. Complete address that identifies the location of a web resource |
Solution
A web browser is a program used to request, retrieve, and display web pages.
So,
$1\to b$
URL is the complete address that identifies the location of a web resource.
So,
$2\to d$
DNS converts a human-readable website name into a numerical network address.
So,
$3\to a$
HTTP is a set of standard rules used by browsers and servers to exchange web content.
So,
$4\to c$
Therefore, the correct matching is
$1\to b,\ 2\to d,\ 3\to a,\ 4\to c$
Solution
Octal to Binary (har digit = 3 bits)
$2 \rightarrow 010$
$2 \rightarrow 010$
$1 \rightarrow 001$
$7 \rightarrow 111$
$(2217)_8 = (010010001111)_2$
Binary to Hex (right se 4-4 group karo)
$\underbrace{0100}_{4}\ \underbrace{1000}_{8}\ \underbrace{1111}_{F}$
$= (48F)_{16} = (048F)_{16}$
$\boxed{\text{Answer : } (048F)_{16}}$ ✓
Solution
We separate the integer and fractional parts.
Integer part: $10101_2 = 1\times2^4 + 0\times2^3 + 1\times2^2 + 0\times2^1 + 1\times2^0 $$= 16 + 0 + 4 + 0 + 1 = 21$
Fractional part: $.10101_2 = 1\times2^{-1} + 0\times2^{-2} + 1\times2^{-3} + 0\times2^{-4} + 1\times2^{-5}$
= 0.5 + 0 + 0.125 + 0 + 0.03125
= 0.65625
Therefore, $10101.10101_2 = 21 + 0.65625 = {21.65625}$
A system administrator is analysing the software layers of a corporate computer. Which of the following statements correctly distinguish system software from application software?
I. Device drivers are classified as application software because end-users install them to run devices.
II. Linux, macOS, and Android are operating systems and are classified as system software.
III. The OS kernel manages CPU scheduling, memory allocation, and hardware access on behalf of programs.
IV. A web browser and a word processor are examples of system software because they help users perform common tasks.
Identify the CORRECT option.
Solution
Device drivers are system software, not application software.
Statement II is correct.
Linux, macOS, and Android are operating systems, and operating systems are system software.
Statement III is correct.
The OS kernel manages CPU scheduling, memory allocation, and hardware access.
Statement IV is incorrect.
A web browser and a word processor are application software, not system software.
So, only statements II and III are correct.
NIMCET 2027
Online Test Series, Information About Examination,
Syllabus, Notification
and More.
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NIMCET 2027
Online Test Series, Information About Examination,
Syllabus, Notification
and More.
View More
