Related Questions

A rule of thumb for choosing indexes for a relational database includes which of the following?
A Indexes are more useful on smaller tables.
B Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries.
C Do not specify a unique index for the primary key of each table.
D Be careful indexing attributes that have null values.
Indexes in which price of stock of companies listed in stock market index are added together and is divided by an adjusted value are classified as
A herring indexes
B group indexes
C John indexes
D Dow Indexes
X is taller than Y, Z is taller than Q , Q is shorter than R, Y and R are of the same height . If the above is true , which of the following conditions must also be true ?
A Z is taller than R
B Z is taller than X
C Y is shorter than Z
D X is taller than Q
'Some pencils are pens' and 'all pens are erasers' . If both these statements are true then which of the following statement (s) os /are definitely true? I. All pencils are erasers II. Some erasers are pencils III. All erasers are pencils
A Only I
B both I and III
C Both I and II
D Only II
Karim is taller than Mina. zafar is taller than Rima. Rima is shorter than Bela. Mina and Bela are of the same height. If these are true, which of the following conditions must also be true?
A Zafar is taller than Bela
B zafar is taller than Karim
C Mina is shorter than Zafar
D Karim is taller than Rima
Jony is taller than Kristin Lito is taller. Maria is shorter than Nancy. Kristin and Nancy are exactly the same height . If the information above is true, Which of the following must also be true?
A Lito is taller than Nancy
B Lito is taller Than Jony
C Kristin is shorten than Lito
D Jony is taller than Maria
Sakib is taller than Sajib , Rajib is taller than Mozib , Mozib is shorter than Hafiz, Sajib and Hafiz are of the same height. If the above is true , which of the following conditions must also be true?
A Sajib is taller than Hafiz
B Sakib is taller than Mozib
C Rajib is taller than sakib
D Sajib is taller than Rajib
Department ores range form two to nine floors in height. If a store has more than three floors , it has a lift. If he statements above are true, which of the following must also be true?
A Second floors do not have lifts
B Fourth floors have lifts
C Only floors above third floor have lifts
D All floors may be reached by lifts
If you have a Green Card, You can stay in USA legally. If the statement above is true, which of the following must also be true?
A If you do not have a Green Card, then you cannot stay in USA legally
B If you could stay in USA legally, then you must have received a Green card
C If you cannot stay in USA legally, then you do not have a Green card
D III only
"A is B's brother. B is C's brother". If these relationships are true. then which of the following must be true?
A A is senior to B
B B is junior to C
C C is brother of A
D B and A are brothers.

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