英文版计算机试题及答案

英文版计算机试题及答案Section 1: Multiple Choice Questions (MCQs)
1. Which of the following is NOT a programming language?
a) Java
b) HTML
c) Python
d) SQL
Answer: b) HTML
2. What does CPU stand for?
a) Central Processing Unit
b) Computer Processing Unit
c) Control Processing Unit
d) Central Program Unit
Answer: a) Central Processing Unit
3. Which of the following is NOT an input device?
a) Keyboard
b) Mouse
c) Printer
d) Scanner
Answer: c) Printer
4. What does RAM stand for?
a) Read-Only Memory
b) Random Access Memory
c) Recordable Audio Media
d) Runtime Activity Monitor
Answer: b) Random Access Memory
5. Which of the following is NOT a type of computer network?
a) LAN (Local Area Network)
b) WAN (Wide Area Network)
c) MAN (Metropolitan Area Network)
d) CAN (Campus Area Network)
Answer: d) CAN (Campus Area Network)
Section 2: Short Answer Questions
1. Define the term "algorithm."
Answer: An algorithm is a step-by-step procedure or set of rules for solving a specific problem or completing a specific task.
2. What is object-oriented programming (OOP)?
Answer: Object-oriented programming is a programming paradigm that organizes code into objects, which are instances of classes. It emphasizes the concept of objects and their interactions to solve complex problems.
3. Explain the difference between static and dynamic memory allocation.
Answer: Static memory allocation is performed at compile-time, where memory is allocated for variables and objects before the program execution starts. Dynamic memory allocation, on the other hand, is performed at runtime using functions like malloc() or new(). It allows for the allocation and deallocation of memory during program execution.
4. What is the purpose of an operating system?
Answer: The operating system is responsible for managing computer hardware and software resources, providing an interface between the user and the computer, and ensuring that various programs and applications can run smoothly. It also provides file management, process management, and memory management.
5. Name three programming paradigms.
Answer: Three programming paradigms are procedural programming, object-oriented programming, and functional programming.
Section 3: Coding Questions
1. Write a Java program to find the factorial of a given number.
```java
import java.util.Scanner;
public class Factorial {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter a number: ");
int number = input.nextInt();
int factorial = 1;
for (int i = 1; i <= number; i++) {
factorial *= i;
}
System.out.println("The factorial of " + number + " is " + factorial); }
}
```
2. Write a Python program to check if a number is prime or not.
```python
def is_prime(number):
if number < 2:
return False
for i in range(2, int(number/2)+1):
if number % i == 0:
return False
return True
number = int(input("Enter a number: "))
if is_prime(number):
print(number, "is prime.")
else:
print(number, "is not prime.")
```
3. Write a C program to reverse a given string. ```c
#include <stdio.h>
#include <string.h>
void reverse_string(char* str) {
int length = strlen(str);
for (int i = 0; i < length/2; i++) {
char temp = str[i];
str[i] = str[length - i - 1];
str[length - i - 1] = temp;
}
}
int main() {
char str[100];
printf("Enter a string: ");
gets(str);
reverse_string(str);
printf("Reversed string: %s", str);
return 0;
}
```
Note: The code provided above is just examples for the coding questions. Please ensure to compile and test the programs before using them in production.
Conclusion:
In this article, we discussed multiple-choice questions, short answer questions, and coding questions related to computer science and programming. These questions cover various aspects of computer knowledge and can be used for self-assessment or preparation for exams or interviews.。