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Basics of Computers

This test consists of 20 questions related to computer basics, which includes software programming languages, operating system, database, data structure, networking etc.

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Questions

Question 1 Multiple Choice (Single Answer)

How many bits of fixed block of text is used in DES (Data Encryption Standard) algorithm?

  1. 56 bits
  2. 64 bits
  3. 32 bits
  4. 16 bits
  5. None of the above
Question 2 Multiple Choice (Single Answer)

Which of the following statement(s) is/are incorrect?

  1. A primary key cannot be NULL.
  2. A foreign key can be NULL.
  3. A foreign key can have the same name as primary key.
  4. A foreign key can have the name other than the primary key.
  5. None of the above
Question 3 Multiple Choice (Single Answer)

Which of the following algorithms uses a hashing function to compute the public keys in cryptography?

  1. Diffie-Hellman
  2. DES( Data Encryption standard)
  3. IDEA (International Data Encryption Algorithm)
  4. Both (1) and (2)
  5. None of the above
Question 4 Multiple Choice (Single Answer)

Which of the following statement(s) is/are true?

  1. A view in database provides security.
  2. A view can hide the complexity of data in the database.
  3. A view can act as aggregate tables.
  4. A view can join multiple tables and simplify them as a single table.
  5. All of the above are true statements.
Question 5 Multiple Choice (Single Answer)

Which of the following statement(s) is/are false?

  1. Transitive dependency exists in the 3rd normal form of database.
  2. 1st normal form ensures that there should be a unique identifier for each row.
  3. 3rd normal form should be in 2nd normal form.
  4. Normalisation is used to eliminate redundant data.
  5. None of the above
Question 6 Multiple Choice (Single Answer)

Which of the following statements is/are not true?

  1. Quick sort uses a pivot element to sort the array.
  2. Heap sort is a stable sort.
  3. Merge sort is a stable sort.
  4. Both (2) and (3)
  5. None of the above
Question 7 Multiple Choice (Single Answer)

Which of the following data structures has an application named 'Backtracking'?

  1. Stack
  2. Queue
  3. Tree
  4. Array
  5. None of the above
Question 8 Multiple Choice (Single Answer)

Which of the following is/are not a framework?

  1. Spring
  2. Struts
  3. Groovy
  4. Grails
  5. All of the above
Question 9 Multiple Choice (Single Answer)

Which of the following statements is true about queue data structure?

  1. A queue is a FIFO type.
  2. Queue can be implemented by linked list.
  3. Queue can be implemented by array.
  4. Both (1) and (2).
  5. (1), (2) and (3) all are true.
Question 10 Multiple Choice (Single Answer)

Identify the language(s) that is/are not object-oriented.

  1. Java
  2. C#
  3. C++
  4. Both (2) and (3)
  5. None of the above
Question 11 Multiple Choice (Single Answer)

Which of the following rules of the E.F. Codd ensures that a user view should be unchanged in case of changing the table structures of the database?

  1. Logical data independence
  2. Physical data independence
  3. Integrity independence
  4. View updation rule
  5. None of the above
Question 12 Multiple Choice (Single Answer)

Which of the following is not a valid operator in Java script language?

  1. ==
  2. ===
  3. !=
  4. >
  5. None of the above
Question 13 Multiple Choice (Single Answer)

Which of the following is not a database server?

  1. MySQL
  2. DB2
  3. Oracle
  4. Informix
  5. None of the above
Question 14 Multiple Choice (Single Answer)

Which of the following is/are a server side scripting language(s)?

  1. Java Script
  2. PHP
  3. ASP .Net
  4. Both (2) and (3)
  5. (1), (2) and (3) all are true
Question 15 Multiple Choice (Single Answer)

Which of the following is not an application server?

  1. IBM Websphere Server
  2. Weblogic Server
  3. Tomcat Server
  4. Glass Fish Server
  5. None of the above
Question 16 Multiple Choice (Single Answer)

Which of the following symbols is used to define the id selector in the Cascading Style Sheets (CSS)?

  1. #
  2. dot (.)
  3. &
  4. @
  5. None of the above
Question 17 Multiple Choice (Single Answer)

Which of the following is a precondition of the binary search?

  1. Binary search is not efficient for large data values like 1000 records.
  2. Array should be either in ascending or descending sorted order.
  3. Mid element should be already defined in the given array.
  4. Both (1) and (2)
  5. None of the above
Question 18 Multiple Choice (Single Answer)

Why is $_SESSION variable used in PHP?

  1. It is used to start a session.
  2. It is used to destroy the session.
  3. It is used to store a session variable.
  4. Both (1) and (3)
  5. None of the above
Question 19 Multiple Choice (Single Answer)

Which of the following SQL functions returns the number of values from the specified column with no NULL value consideration?

  1. COUNT
  2. SUM
  3. AVG
  4. MAX
  5. None of the above
Question 20 Multiple Choice (Single Answer)

Which of the following is an example of queue data structure?

  1. Tower of Hanoi
  2. CPU scheduling
  3. Quick sort
  4. All of the above
  5. None of the above
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