High Court Clerk / Reader (Lahore / Peshawar) Computer Science: Practice MCQs with Answers

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Sample High Court Clerk / Reader (Lahore / Peshawar) Computer Science practice questions

1. Q1. What is the shortcut key for "Decrease Font Size" of the selected text?

   • A) Ctrl + Shift + >
   • B) Ctrl + Shift + <
   • C) Ctrl + >
   • D) Ctrl + <

   Answer: Ctrl + Shift + <

2. Q2. Which OOP principle allows a method to have different behaviors depending on the object calling it?

   • A) Inheritance
   • B) Encapsulation
   • C) Abstraction
   • D) Polymorphism

   Answer: Polymorphism

3. Q3. In a hash table, what is the average time complexity for insertion and retrieval?

   • A) O(n)
   • B) O(log n)
   • C) O(n²)
   • D) O(1)

   Answer: O(1)

4. Q4. What is the time complexity of linear search in an unsorted array?

   • A) O(1)
   • B) O(log n)
   • C) O(n)
   • D) O(n²)

   Answer: O(n)

5. Q5. In a RIGHT JOIN, which table's rows are all returned regardless of a match?

   • A) Left table
   • B) Both tables equally
   • C) The joined result table
   • D) Right table

   Answer: Right table

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