R4RIN – MCQs, Mock Tests | SQL SQL MCQ SET 14

The maximum length of the varchar columns is ____________

1. Upto 65, 535 bytes
2. Upto 256 bytes
3. Upto 65, 567 bytes
4. None of the mentioned

✅ Correct Answer: 1

In oracle database variable length column is declared by ____________

1. Varchar
2. Varchar 3
3. Varchar2
4. None of the mentioned

✅ Correct Answer: 3

Mysql support different character sets, which command is used to display all character sets?

1. SHOW CHARACTER SET;
2. SHOW;
3. CHARACTER SET;
4. None of the mentioned

✅ Correct Answer: 1

Which one is the correct declaration for choosing the character set other than default?

1. Varchar(20) character set utf8;
2. Varchar(20);
3. Varchar(20) character set;
4. None of the mentioned

✅ Correct Answer: 1

Which “text type” has the maximum number of bytes?

1. Tiny text
2. Text
3. Medium text
4. Long text

✅ Correct Answer: 4

Which among the following have the maximum bytes?

1. Varchar
2. Char
3. Text type
4. Both Varchar and Char

✅ Correct Answer: 3

What will happen if the data being loaded into a text column exceeds the maximum size of that type?

1. Extra memory will be allocated
2. Process terminate
3. Data will be truncated
4. Depend on the system

✅ Correct Answer: 3

Which data type is more suitable for storing “small notes” in Mysql?

1. Char
2. Varchar
3. Mediumtext
4. Longtext

✅ Correct Answer: 3

Which data type is more suitable for storing “documents” in Mysql?

1. Varchar
2. Longtext
3. Mediumtext
4. Either Varchar or Longtext

✅ Correct Answer: 2

“Numeric Data” is used to store ____________

1. Whole numbers
2. Natural numbers
3. Rational numbers
4. Both Whole and Natural numbers

✅ Correct Answer: 4

Which Numeric Data type has the largest range?

1. Mediumint
2. Smallint
3. Int
4. Tinyint

✅ Correct Answer: 3

What will be the storage pattern for “float(4,2)” in Mysql?

1. Total of four digits, two to the left of decimal and two to the right of decimal
2. Total of six digits
3. Total of four digits, not distributed uniformly
4. None of the mentioned

✅ Correct Answer: 1

Which among the following are the correct representation of “float(4,2)”?

1. 24.33
2. 124.4
3. 12.123
4. Both 24.33 and 124.4

✅ Correct Answer: 4

Which among the following is the correct representation of “float(5,0)”?

1. 12345.123
2. 12345.1
3. 12345
4. 123.123

✅ Correct Answer: 3

Which among the following is the correct representation of “float(1,1)”?

1. Total of 1 digit
2. Total of 2 digit
3. Total of 2 digit, one digit at right of the decimal, one digit at left of the decimal
4. None of the mentioned

✅ Correct Answer: 1

Which data type is used to store data and time in Mysql?

1. Numeric data type
2. Text data type
3. Temporal data type
4. Char/Varchar

✅ Correct Answer: 3

What is the default format for “Date” data type?

1. YYYY-MM-DD
2. MM-YYYY-DD
3. DD-MM-YYYY
4. None of the mentioned

✅ Correct Answer: 1

What is the default format for “Datetime” data type?

1. YYYY-MM-DD HH:MI:SS
2. MM-YYYY-DD HH:MI:SS
3. DD-YYYY-MM MI:HH:SS
4. None of the mentioned

✅ Correct Answer: 1

What is the default format for “Timestamp” data type?

1. YYYY-MM-DD HH:MI:SS
2. MM-YYYY-DD HH:MI:SS
3. DD-YYYY-MM MI:HH:SS
4. None of the mentioned

✅ Correct Answer: 1

What is the default format for “Year” data type?

1. YYYY
2. YYYY-DD-MM
3. MM-YYYY-DD
4. None of the mentioned

✅ Correct Answer: 1

What is the default format for “Time” data type?

1. HHH:MI:SS
2. SS:MI:HHH
3. MI:SS:HHH
4. None of the mentioned

✅ Correct Answer: 1

Is “Datetime” and “Timestamp” are same data type?

1. Yes
2. No
3. Depends
4. None of the mentioned

✅ Correct Answer: 1

Which value will show an error when stored in float(4,2)?

1. 12.11
2. 13.1
3. 1.12
4. 123.44

✅ Correct Answer: 4

The datatype for single precision floating point number is ____________

1. FLOAT
2. DOUBLE
3. INT
4. BIGINT

✅ Correct Answer: 1

Which datatype is used for a fixed length binary string?

1. VARCHAR
2. BINARY
3. VARBINARY
4. BLOB

✅ Correct Answer: 2

Which datatype means a variable length non binary string?

1. VARCHAR
2. BINARY
3. VARBINARY
4. BLOB

✅ Correct Answer: 1

Which data and time datatype stores time value in ‘hh:mm:ss’ format?

1. DATE
2. TIME
3. DATETIME
4. TIMESTAMP

✅ Correct Answer: 2

Which spatial datatype is used to store a curve?

1. GEOMETRY
2. POINT
3. LINESTRING
4. POLYGON

✅ Correct Answer: 3

The datatype INT stores ___________

1. 16 bit
2. 32 bit
3. 48 bit
4. 64 bit

✅ Correct Answer: 2

The datatype SMALLINT stores ___________

1. 16 bit
2. 32 bit
3. 48 bit
4. 8 bit

✅ Correct Answer: 1

The storage size in bytes required for the MEDIUMINT datatype is ___________

1. 1
2. 2
3. 3
4. 4

✅ Correct Answer: 3

The storage size in bytes required for the MEDIUMINT datatype is ___________

1. 1
2. 2
3. 3
4. variable

✅ Correct Answer: 4

The REAL type is synonym for ___________

1. FLOAT
2. INT
3. DOUBLE
4. BIT

✅ Correct Answer: 3

The maximum number of elements allowed in SET() is ___________

1. 16
2. 32
3. 64
4. 128

✅ Correct Answer: 3

The maximum size in bytes of a row in MySQL is __________

1. 65534
2. 65535
3. 65536
4. 65537

✅ Correct Answer: 2

For which type are illegal values converted to the appropriate ‘zero’ value?

1. Numeric
2. String
3. ENUM
4. TIME

✅ Correct Answer: 4

What is the command to see the warning messages?

1. DISPLAY WARNINGS
2. DISP WARNINGS
3. DISP WARNING
4. SHOW WARNINGS

✅ Correct Answer: 4

The SQL mode to check for divide by zero error is ________________

1. STRICT_ALL_TABLES
2. ERROR_FOR_DIVISION_BY_ZERO
3. ERROR_DIVIDE_BY_ZERO
4. ERROR_WHEN_DIVIDE_BY_ZERO

✅ Correct Answer: 2

Which mode is used to turn on strict mode and all of the additional restrictions?

1. STRICT_ALL_TABLES
2. ERROR_FOR_DIVISION_BY_ZERO
3. TRADITIONAL
4. ERROR_WHEN_DIVIDE_BY_ZERO

✅ Correct Answer: 3

Which mode is a shorthand for ‘both strict modes plus a bunch of other restrictions’?

1. STRICT_ALL_TABLES
2. STRICT_TRANS_TABLES
3. TRADITIONAL
4. ERROR_WHEN_DIVIDE_BY_ZERO

✅ Correct Answer: 3

Which mode prevents MySQL to perform full checking of date parts?

1. ALLOW_DATES_INVALID
2. ALLOW_INVALID_DATES
3. PREVENT_DATE_CHECK
4. STOP_DATES_CHECK

✅ Correct Answer: 2

Which keyword suppresses errors?

1. SUPPRESS
2. STOP
3. PREVENT
4. IGNORE

✅ Correct Answer: 4

Which mode prevents entry of the ‘zero’ date value in strict mode?

1. SUPPRESS
2. NO_ZERO_DATE
3. PREVENT
4. NO_ZERO_IN_DATE

✅ Correct Answer: 2

Which column attribute provides unique numbers for identification?

1. AUTO_INCREMENT
2. UNSIGNED
3. IDENTIFY
4. DESCRIBE

✅ Correct Answer: 1

The AUTO_INCREMENT sequences normally begin at __________

1. 0
2. 1
3. -1
4. 2

✅ Correct Answer: 2

The value of recently generated sequence number can be obtained by ____________

1. LAST_INSERT_ID()
2. LATEST_INSERT_ID()
3. INITIAL_INSERT_ID()
4. INSERT_ID()

✅ Correct Answer: 1

When no AUTO_INCREMENT value has been generated during the current connection, LAST_INSERT_ID() returns ____________

1. -1
2. 0
3. 1
4. 2

✅ Correct Answer: 2

Suppose the last row has the AUTO_INCREMENT column value 32. Suppose a new row is added by setting AUTO_INCREMENT value equal to 100. The next row added will have value _____________

1. 32
2. 33
3. 100
4. 101

✅ Correct Answer: 4

The number of rows in the table is 10. Suppose all rows are deleted. The new row starts with sequence number ____________

1. 11
2. 1
3. 100
4. 101

✅ Correct Answer: 2

In a MyISAM table, if the maximum value of an AUTO_INCREMENT increment column is 12 and that row is deleted, the next value generated is _____________

1. 12
2. 13
3. 1
4. 14

✅ Correct Answer: 2

In MyISAM tables, when a table is emptied with the TRUNCATE TABLE, the counter begins at _____________

1. 0
2. 1
3. -1
4. arbitrary

✅ Correct Answer: 2