Q 1 - Consider the following schema −

STUDENTS(student_code, first_name, last_name, email, 
         phone_no, date_of_birth, honours_subject, percentage_of_marks);

Which of the following query would display all the students whose first name starts with the character ‘A’?

A - select first_name from students where first_name like ‘A%’;

B - select first_name from students where first_name like ‘%A’;

C - select first_name from students where first_name like ‘%A%’;

D - select first_name from students where first_name like ‘A’;

Q 2 - What is returned by ROUND(789.8389, 2)?

A - 789.84

B - 789.83

C - 78

D - 789.00

Q 3 - Consider the following schema −

STUDENTS(student_code, first_name, last_name, email, 
         phone_no, date_of_birth, honours_subject, percentage_of_marks);

Which query will display the names and honours subjects of all students and if a student has not yet been given a honours subject yet, then it should display ‘No Honours Yet’.

A - select first_name, last name, nvl(honours_subject, ‘No Honours Yet’) from students;

B - select first_name, last name, nvl2(honours_subject, ‘No Honours Yet’) from students;

C - select first_name, last name, honours_subject, from students;

D - select first_name, last name, nullif(honours_subject, ‘No Honours Yet’) from students;

Q 4 - Consider the following schema −

HONOURS_SUBJECT(subject_code, subject_name, department_head);

LOCATIONS(subject_code, department_name, location_id, city);

Select the right query for retrieving records from the tables HONOURS_SUBJECT and LOCATIONS with the ON clause

A - select h.subject_name, l.department_name, h.department_head, l.city from honours_subject h join location l on(h.subject_code = l.subject_code);

B - select h.subject_name, l.department_name, h.department_head, l.city from honours_subject h join location l on(subject_code);

C - select h.subject_name, l.department_name, h.department_head, l.city from honours_subject h, location l on(subject_code);

D - None of the above.

Q 5 - Which of the following is not true about the COUNT function?

A - COUNT(*) returns the number of rows in the table.

B - COUNT(exp) returns the number of rows with non-null values for the exp.

C - COUNT(DISTINCT exp) returns the number of unique, non-null values in the column.

D - All are true.

Q 6 - In which of the following cases a DML statement is not executed?

A - When existing rows are modified

B - When some rows are deleted

C - When a table is deleted

D - All of the above

Q 7 - Which of the following is not true about the database objects?

A - Indexes improve performance of queries.

B - Views give alternative names to objects.

C - Sequences are numeric value generators.

D - Tables are the basic unit of storage.

Q 8 - Which of the following is not true about simple views?

A - They derive data from one table.

B - They contain no functions or grouping.

C - You cannot perform DML operations through a simple view.

D - All of the above are true.

Q 9 - Which of the following is not true about a sequence?

A - They are used for generating sequential numbers.

B - Sequences are created by the CREATE SEQUENCE statement.

C - You cannot modify a sequence.

D - None of the above.

Q 10 - Which of the following is not a developer’s privilege?

A - CREATE USER

B - CREATE TABLE

C - CREATE VIEW

D - CREATE SEQUENCE